relnote: Avoid redundant recvmmsg when the previous recvmmsg returned

net/tools/quic/quic_server.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/tools/quic/quic_server.h"
 
 #include <errno.h>
 #include <features.h>
 #include <netinet/in.h>
 #include <string.h>
@@ skipping 191 matching lines @@
   close(fd_);
   fd_ = -1;
 }
 
 void QuicServer::OnEvent(int fd, EpollEvent* event) {
   DCHECK_EQ(fd, fd_);
   event->out_ready_mask = 0;
 
   if (event->in_events & EPOLLIN) {
     DVLOG(1) << "EPOLLIN";
-    bool read = true;
-    while (read) {
+    bool more_to_read = true;
+    while (more_to_read) {
       if (use_recvmmsg_) {
-        read = packet_reader_->ReadAndDispatchPackets(
+        more_to_read = packet_reader_->ReadAndDispatchPackets(
             fd_, port_, dispatcher_.get(),
             overflow_supported_ ? &packets_dropped_ : nullptr);
       } else {
-        read = QuicPacketReader::ReadAndDispatchSinglePacket(
+        more_to_read = QuicPacketReader::ReadAndDispatchSinglePacket(
             fd_, port_, dispatcher_.get(),
             overflow_supported_ ? &packets_dropped_ : nullptr);
       }
     }
   }
   if (event->in_events & EPOLLOUT) {
     dispatcher_->OnCanWrite();
     if (dispatcher_->HasPendingWrites()) {
       event->out_ready_mask |= EPOLLOUT;
     }
   }
   if (event->in_events & EPOLLERR) {
   }
 }
 
 }  // namespace tools
 }  // namespace net